{"product_id":"mullard-12au7-ecc82-matched-pair-philips-shield-logo-blackburn-64-65-strong","title":"Mullard 12AU7 ECC82 Matched Pair Philips\/Shield Logo - Blackburn '64\/'65 -Strong","description":"\u003cdiv\u003e\u003cb\u003e\u003cspan style=\"color: #2a633a; font-family: Arial; font-size: large;\"\u003eTube Summary\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cb\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eNo other tubes can deliver vocals like the Blackburn Mullard's, and that's a fact. These ECC82 tubes, especially the 1960s ones, are extremely hard to find today and are becoming every serious audiophile's darling. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cb style=\"color: rgb(42, 99, 58);\" data-mce-style=\"color: rgb(42, 99, 58);\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eSound Characteristics\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cb style=\"color: rgb(42, 99, 58);\" data-mce-style=\"color: rgb(42, 99, 58);\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eThe overall tonality of Mullard ECC82 tubes is warm and lively with a very spacious sound stage. \"Like a warm British jacket of the finest tweed, these glorious tubes have an attractive sweet warmth in their midrange and lower regions.\"  This is how the experts on audiotubes.com describe the sound signature of British-made Mullard tubes. The top end is silky and pleasant and doesn't get rolled off. They retain a fine sense of \"air\" at the top, and the upper midrange is smooth and liquid. These tubes reproduce the human voice, especially female voices, with haunting realism. The British made Mullard tubes are also known to have an attractive sparkle at the top with rich bass...now we know where that \"warm British jacket\" comes from!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb style=\"color: rgb(42, 99, 58);\" data-mce-style=\"color: rgb(42, 99, 58);\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eProfessional Sound Evaluation\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eThe pair worked wonderfully and sounded terrific in our professional studio setup for monitoring. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e - Input: Cambridge Audio CXC V2 dedicated CD transport + Schiit Audio Bifrost 2 Multibit DAC\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e - \u003cb\u003eAmplification: Woo Audio \u003c\/b\u003e\u003cb\u003eWA7 Fireflies (3rd gen) Balanced Headphone Amplifier\u003c\/b\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e - Output: Focal Clear MG Pro open-back headphones\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eOur full tube sound review was written 100% based on the actual listening experience while this pair of tubes were running in the system described above.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb style=\"color: rgb(42, 99, 58);\" data-mce-style=\"color: rgb(42, 99, 58);\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eProfessional testing \u0026amp; sound evaluation\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cb style=\"color: rgb(42, 99, 58);\" data-mce-style=\"color: rgb(42, 99, 58);\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv id=\"ds_div\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eThis set was tested and certified by RoeTest V11 tester with the following result: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eTube 1: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured transconductance (GM): 2.04\/1.63 mA\/V  - 93%\/74%  (100% = 2.20 mA\/V)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured plate current (IA): 9.752\/8.027 mA  - 93%\/76%  (100% = 10.5 mA)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eTube 2:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured transconductance (GM): 2.28\/1.7 mA\/V  - 104%\/77%  (100% = 2.20 mA\/V)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eMeasured plate current (IA): 11.455\/9.28 mA  - 109\/88%  (100% = 10.5 mA)\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eNO shorts, leakage or gas. NO noise or microphonics.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eCurve trace is also included in the original RoeTest report.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"color: #2a633a; font-family: Arial; font-size: large;\"\u003e\u003cb\u003eAppearance \u0026amp; cosmetic condition\u003c\/b\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" data-mce-style=\"font-family: Arial; font-size: large;\"\u003eBoth tubes are in excellent cosmetic condition. Nearly 100% of the paint and lettering are well retained. The Blackburn date codes etched on glass are also perfectly visible on both  tubes: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\" data-mce-style=\"font-family: Arial; font-size: large;\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12.0pt; font-family: 'Arial',sans-serif; color: black; background: white;\"\u003e\u003cstrong\u003eGf2 B4D1\u003c\/strong\u003e (Gf1 = ECC82 production gen #2, B= Blackburn,\u003cstrong\u003e 4 = 1964\u003c\/strong\u003e, D = April, 1 = Week 1 of production month)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12.0pt; font-family: 'Arial',sans-serif; color: black; background: white;\"\u003e\u003cstrong\u003eGf2 B5C4\u003c\/strong\u003e (Gf2 = ECC82 production gen #2, B= Blackburn,\u003cstrong\u003e 5 = 1965,\u003c\/strong\u003e C = March, 4 = Week 4 of production month)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12.0pt; font-family: 'Arial',sans-serif; color: black; background: white;\"\u003e \u003c\/span\u003e\u003cspan style=\"font-size: 13.0pt; font-family: 'Arial',sans-serif; color: black; background: white;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb style=\"color: rgb(42, 99, 58);\" data-mce-style=\"color: rgb(42, 99, 58);\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003ePackaging\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: Arial; font-size: large;\"\u003eThis pair of tubes will be packaged in new white boxes.\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: large;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cstyle\u003e\n\u003c!--\n \/* Font Definitions *\/\n @font-face\n\t{font-family:\"Cambria Math\";\n\tpanose-1:2 4 5 3 5 4 6 3 2 4;\n\tmso-font-charset:0;\n\tmso-generic-font-family:roman;\n\tmso-font-pitch:variable;\n\tmso-font-signature:-536869121 1107305727 33554432 0 415 0;}\n@font-face\n\t{font-family:Aptos;\n\tmso-font-charset:0;\n\tmso-generic-font-family:swiss;\n\tmso-font-pitch:variable;\n\tmso-font-signature:536871559 3 0 0 415 0;}\n \/* Style Definitions *\/\n p.MsoNormal, li.MsoNormal, div.MsoNormal\n\t{mso-style-unhide:no;\n\tmso-style-qformat:yes;\n\tmso-style-parent:\"\";\n\tmargin:0in;\n\tmso-pagination:widow-orphan;\n\tfont-size:11.0pt;\n\tfont-family:\"Aptos\",sans-serif;\n\tmso-ascii-font-family:Aptos;\n\tmso-ascii-theme-font:minor-latin;\n\tmso-fareast-font-family:Aptos;\n\tmso-fareast-theme-font:minor-latin;\n\tmso-hansi-font-family:Aptos;\n\tmso-hansi-theme-font:minor-latin;\n\tmso-bidi-font-family:\"Times New Roman\";\n\tmso-bidi-theme-font:minor-bidi;\n\tmso-font-kerning:1.0pt;\n\tmso-ligatures:standardcontextual;}\n.MsoChpDefault\n\t{mso-style-type:export-only;\n\tmso-default-props:yes;\n\tfont-size:11.0pt;\n\tmso-ansi-font-size:11.0pt;\n\tmso-bidi-font-size:11.0pt;\n\tmso-ascii-font-family:Aptos;\n\tmso-ascii-theme-font:minor-latin;\n\tmso-fareast-font-family:Aptos;\n\tmso-fareast-theme-font:minor-latin;\n\tmso-hansi-font-family:Aptos;\n\tmso-hansi-theme-font:minor-latin;\n\tmso-bidi-font-family:\"Times New Roman\";\n\tmso-bidi-theme-font:minor-bidi;}\n@page WordSection1\n\t{size:8.5in 11.0in;\n\tmargin:1.0in 1.0in 1.0in 1.0in;\n\tmso-header-margin:.5in;\n\tmso-footer-margin:.5in;\n\tmso-paper-source:0;}\ndiv.WordSection1\n\t{page:WordSection1;}\n--\u003e\n\u003c\/style\u003e","brand":"Mullard","offers":[{"title":"Default Title","offer_id":48497654268224,"sku":"266794350110","price":224.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/2388\/5888\/files\/57_f4311226-1eb0-4c8f-a132-ab3f4d2d237b.jpg?v=1714704363","url":"https:\/\/www.soundlumia.com\/it\/products\/mullard-12au7-ecc82-matched-pair-philips-shield-logo-blackburn-64-65-strong","provider":"Soundlumia","version":"1.0","type":"link"}